Numbers

1	satu		21	dua puluh satu
2	dua		25	dua puluh lima
3	tiga		30	tiga puluh
4	empat		50	lima puluh
5	lima		65	enam puluh lima
6	enam		72	tujuh puluh dua
7	tujuh		80	delapan puluh
8	delapan		90	sembilan puluh
9	sembilan		100	seratus
10	sepuluh		110	seratus sepuluh
11	sebelas		150	seratus lima puluh
12	dua belas		200	dua ratus
15	lima belas		900	sembilan ratus
20	dua puluh		1000	seribu

0	nol	zero
0.2	nol koma dua	zero point two
1.7	satu koma tujuh	one point seven
1/4	seperempat	a quarter
1/2	setengah	half
1/8	seperdelapan	one eighth
10.000	sepuluh ribu	ten thousand
100.000	seratus ribu	one hundred thousand
500.000	lima ratus ribu setengah juta	five hundred thousand half a million
1.000.000	sejuta/satu juta	one million
1.000.000.000	satu milyar	one billion

Comma and Zero

In Indonesian the comma that is used in English to signify thousands is replaced by a dot. There are two words for “zero”: nol and kosong, both about equally commonly used.

Number

The word nomor functions as a kind of “marker word” or “prefix” that appears in front of the citation of a number. When you are saying addresses out loud, the word nomor is usually (but not always) inserted in front of the number, especially numbers less than twenty.

Dimana rumah Anda? – Where do you live?
Rumah saya di Jalan Aru nomor 16. – My house is at number 16 Aru Street.

Date

When you say the date (that is the number that corresponds with a day of the month followed by the name of the month, and sometimes followed by the year as well), the date is usually preceded by the marker word tanggal(pronounced a bit like “tonguegull”).

tanggal dua puluh lima – the 25th.

If you also mention the name of the month as part of the date, the marker word bulan is usually dropped from in front of the name of the month. Thus:

tanggal tiga Mei
 – the third of May
tanggal enam belas Juli – the 16th of July